Tethys, named after a Greek sea goddess, is an autonomous underwater vehicle unlike any other. Combining the best traits of traditional types of AUVs, it can travel faster and farther than the vehicles oceanographers currently rely on. It can also stay out at sea for weeks on end and carry larger amounts of scientific instruments than most of its counterparts, according to MBARI.

Tethys with its master

Chief Technologist Jim Bellingham, shown here, led design and development of the Tethys underwater robot.

The vehicle took four years of design and development work, and underwent real-world testing cruising around Monterey Bay for much of the month of October, the team said in a statement. During those tests, Tethys completed a four-day expedition with ample battery life to spare.

Tethys' guts

Monterey Bay Aquarium Research Institute employee Mike Godin works on the electronics system aboard Tethys.

One of the things that makes this bot special is that it has the ability to make some decisions on its own, without needing human operators to direct its every move.

This could allow it to conduct continuous research, without having to send back data and wait for its next command. Designed to study oceanic algae, Tethys could keep itself positioned in the center of an algal bloom, adjusting its position and speed to match that of the bloom as it moves in the ocean's currents.